KR20090067147A - Gearing apparatus, and gear working machine - Google Patents

Abstract

Provided are a gearing apparatus capable of shortening the gearing time period, and a gear working machine. The gearing apparatus gears a grinding stone (13) and a gear-shaped work (W) into gearing rotational phase relations, before they are worked, by bringing them into meshing engagement and by turning them relatively.The gearing apparatus comprises a tailstock (16) supported movably in the axial direction of the work (W) for pushing the work (W) onto the side of a turntable (18) to turn the work (W) on its axis, thereby to hold the work (W) turnably, and a sensor (33) attached to the tailstock (16) for confronting the work (W) thereby to detect the rotational phase when the tailstock (16) holds the work (W).

Description

GEARING APPARATUS, AND GEAR WORKING MACHINE}

TECHNICAL FIELD The present invention relates to a meshing device and a gear processing machine that engage with each other so that a rotational phase relationship between a rotary tool and a work gear can be engaged.

Background Art Conventionally, gear processing machines such as gear grinding tables and hob boards have been provided for processing a gear to be processed by a rotary tool. In such a gear processing machine, the rotary tool and the to-be-processed gear are synchronously controlled by individual drive motors, and the gear processing is performed by engaging the rotary tool and the to-be-processed gear.

Moreover, in a gear processing machine, the tooth tip (mountain) and the tooth groove (bone) of the rotary tool, the tooth tip (mountain) and the tooth groove (bone) of the gear to be processed before engaging the rotary tool and the gear to be machined are engaged. ), The "engagement" step is performed to make the interlockable rotational phase relationship. In this meshing step, the rotational phases of the rotary tool and the processed gear are detected by a contact sensor such as a touch probe or a non-contact sensor such as a proximity sensor, and based on the detection result, the amount of shift of the rotational phases is corrected. The rotational phases of the rotating tool and the gear to be processed are corrected.

The engagement device which reads the tooth tip and the tooth groove of a to-be-processed gear by such a sensor, and calculates and engages the rotation of a rotating tool and a to-be-processed gear is disclosed by patent document 1, for example.

Patent Document 1: Japanese Unexamined Patent Publication No. 2004-25333

Disclosure of Invention

Problems to be Solved by the Invention

However, in the conventional engagement device, since the sensor for detecting the rotational phase of the workpiece gear is formed on the rotary tool side, that is, on the column side rotatably supporting the rotary tool, the engagement operation becomes complicated and the It was leading to an increase.

In short, in the case of performing the engagement operation in the conventional engagement device, when the rotational phase of the gear to be processed is detected by the sensor, the rotary tool must be evacuated once at a position that does not adversely affect the detection of the sensor. After rotational phase detection, the rotary tool must be moved from the retracted position to the machining position while moving the sensor from the detected position to the retracted position. As a result, the time required for the engagement operation was taken as much as the reciprocating operation of the rotary tool between the machining position and the retracted position, and the reciprocating operation of the sensor between the detection position and the retracted position.

Therefore, an object of the present invention is to provide a meshing device and a gear processing machine capable of shortening the meshing time as solving the above problems.

Means to solve the problem

The engagement device which concerns on the 1st invention which solves the said subject,

An engagement device for engaging a rotary tool and a work gear, and engaging them so that there is a rotational phase relationship in which the rotary tool and the work gear can be engaged, prior to gear rotation by relatively rotating them.

A workpiece holding means which is movably supported in the axial direction of the workpiece gear and presses the workpiece gear toward the workpiece rotating means for rotating the shaft around the axis, thereby holding the workpiece gear rotatably;

It is provided in the said workpiece holding means, When the workpiece holding means hold | maintains the to-be-processed gear, it is provided with the rotation phase detection means which detects the rotational phase of the to-be-processed gear facing the to-be-processed gear. It is done.

The engagement device which concerns on the 2nd invention which solves the said subject,

In the engagement device according to the first invention,

The rotation phase detecting means is arranged on the opposite side of the rotary tool with the work gear therebetween.

The engagement device which concerns on 3rd invention which solves the said subject,

In the engagement device according to the first invention,

And the evacuation means for evacuating the rotation phase detection means from the detection position for detecting the rotation phase of the work gear.

The engagement device which concerns on 4th invention which solves the said subject,

In the engagement device according to any one of the first to third invention,

When the said workpiece holding means hold | maintains the to-be-processed gear, It is characterized by including the process error absorbing means which absorbs the machining error in the axial direction of the to-be-processed gear.

The gear processing machine which concerns on 5th invention which solves the said subject,

The engaging device in any one of Claims 1-4 was provided. It is characterized by the above-mentioned.

Effects of the Invention

According to the engagement device according to the first aspect of the present invention, prior to engaging the rotary tool and the work gear, and rotating them relatively to perform gear processing, there is a rotational phase relationship in which the rotary tool and the work gear can be engaged. An engaging device which engages as much as possible, wherein the engaging device is movably supported in the axial direction of the work gear and presses toward the workpiece rotating means for rotating the work gear around its axis to hold the work gear rotatably. A rotational phase which is formed in the workpiece holding means and the workpiece holding means, and the workpiece holding means detects the rotational phase of the workpiece gear against the workpiece gear when the workpiece holding means holds the workpiece. By providing a detection means, the said workpiece holding means hold | maintains the to-be-processed gear, and the said rotation It is possible to carry out the detection of the rotational phase by the phase detection means, it is possible to shorten the time of the engagement.

According to the engagement device which concerns on 2nd invention, in the engagement device which concerns on 1st invention, the said rotation phase detection means is arrange | positioned on the opposite side of the said rotation tool with the said to-be-processed gear interposed, and the said rotation phase detection means is carried out. Since it does not participate in the engagement operation of the rotary tool, the operation can be simplified, and since cutting chips of the work gear are not attached to the rotation phase detection means, damage of the rotation phase detection means can be prevented. Can be.

According to a meshing device according to a third aspect of the invention, in the meshing device according to the first aspect of the invention, the rotational phase detecting means is provided with a evacuation means for retracting from a detection position for detecting the rotational phase of the gear to be processed, thereby causing the rotation. Since the phase detection means is not involved in the engagement operation of the rotary tool, the operation can be simplified, and since the cutting chips of the work gear are not attached to the rotation phase detection means, Damage can be prevented.

According to the engagement device which concerns on 4th invention, in the engagement device which concerns on any one of 1st-3rd invention, when the said workpiece | work holding means hold | maintains the said to-be-processed gear, it is in the axial direction of the to-be-processed gear. By providing a machining error absorbing means for absorbing a machining error of the tool, the rotational phase detecting means can be placed at the predetermined detection position even when the machining gear in which the machining error occurs in the axial direction is maintained. The road rotation phase can be detected.

According to the gear processing machine which concerns on 5th invention, it is equipped with the engagement apparatus which concerns on any one of 1st-4th invention, Comprising: It engages a rotary tool and a to-be-processed gear, and rotates them relatively, and performs gear processing. Previously, it has an engagement device for engaging so that the rotary tool and the work gear can be engaged in a rotational phase relationship that can be engaged, and is supported so as to be movable in the axial direction of the work gear, When the workpiece holding means is formed on the workpiece holding means, the workpiece holding means for pressing the workpiece rotating means to rotate around to rotatably hold the workpiece, and the workpiece holding means holds the workpiece. And a rotational phase detecting means for detecting a rotational phase of the gear to be opposed to the gear to be processed. In contrast, the rotation phase detecting means is disposed on the opposite side of the rotary tool with the working gear interposed therebetween, and the rotation phase detecting means is evacuated from the detection position for detecting the rotation phase of the working gear. It is provided with the retraction means, and when the said workpiece holding means hold | maintains the to-be-processed gear, it is equipped with the process-error absorption means which absorbs the machining error in the axial direction of the to-be-processed gear. Thereby, while the said workpiece | work holding means can hold | maintain the said to-be-processed gear and can detect the rotational phase by the said rotational phase detection means, the engagement time can be shortened. In addition, since the rotation phase detection means is not involved in the engagement operation of the rotary tool, the operation can be simplified, and since the cutting chips of the work gear are not attached to the rotation phase detection means, the rotation Damage to the phase detection means can be prevented. In addition, even when the machining gear in which the machining error occurs in the axial direction is held, the rotation phase detection means can be arranged at a constant detection position, so that the rotation phase can be detected with high accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the principal part of the gear grinding mill provided with the engaging device which concerns on 1st Example of this invention.

2 is a schematic view showing a mounting structure of a sensor.

3 is a view showing the positional relationship between the grindstone and the sensor with respect to the workpiece.

Fig. 4 is a side view of the main portion of a gear grinding machine equipped with an engagement device according to a second embodiment of the present invention.

5 is a schematic view showing a mounting structure of a sensor.

6 is a view showing the positional relationship between the grindstone and the sensor with respect to the workpiece.

Best Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, the engagement apparatus which concerns on this invention is demonstrated in detail using drawing.

Example 1

1 is a side view of a main portion of a gear grinding machine equipped with an engagement device according to a first embodiment of the present invention, FIG. 2 is a schematic view showing a mounting structure of a sensor, and FIG. to be.

As shown in FIG. 1, on the bed 11 of the gear grinder 1 which is a gear processing machine, the column 12 is supported so that a movement to an X-axis direction (horizontal direction) is possible. On the front surface of the column 12, a grindstone (rotary tool) 13, which is cylindrical in shape and has a spiral thread formed on its outer peripheral surface, is rotatably supported around a horizontal axis, This grindstone 13 is supported by the column 12 so that it can move to a Y-axis direction (horizontal direction), a Z-axis direction (up-down direction), and is rotatable in A direction. The gear grinding is performed by engaging the grindstone 13 with the gear-like workpiece (working gear) W described later.

In addition, on the bed 11, the counter column 14 is formed so that it may face the whole surface of the column 12. As shown in FIG. The guide member 15 is attached to the front surface which opposes the column 12 of the counter column 14, and the tail stock 16 is supported by this guide member 15 so that the lifting and lowering in the Z-axis direction is possible. And a substantially conical tail stock center 17 is supported by the lower end of the tail stock 16 so that rotation is possible about the vertical axis with respect to the tail stock 16.

Below the tail stock 16, on the bed 11, a disk-shaped rotary table (workpiece rotating means) 18 is rotatably supported in the C-direction (around the vertical axis). A substantially conical mounting jig 19 is detachably supported at the upper portion of the rotary table 18, and the work W is detachable at the upper portion of the mounting jig 19.

In addition, the center axis of the tail stock center 17, the center axis of the turntable 18, and the center axis of the mounting jig 19 are disposed coaxially. That is, with respect to the workpiece | work W mounted on the mounting jig 19, the tail stock 16 is lowered from the upper side, and the tail stock center 17 is moved to the center hole Wa of the workpiece | work W (FIG. 3), the workpiece can be held. Thereby, by rotating the rotary table 18, it becomes possible to rotate the hold | maintained workpiece | work W in the C direction with the tail stock center 17 and the mounting jig 19. FIG.

As shown in FIGS. 1-3, the step part 16a is formed in the counter column 14 (guide member 15) side of the tail stock 16. As shown in FIG. An upper end of the rod 41 is attached to the stepped portion 16a of the tail stock 16, and a sensor (rotational phase detection means) is provided at the lower end of the rod 41 via the support plate 31 and the support rod 32. 33 is supported. The sensor 33 is a non-contact sensor, such as a proximity sensor, which detects the rotational phase of the workpiece | work W. As shown in FIG.

The through plate 31a is formed in the support plate 31, and the ring member 34 is formed in the upper part and the lower part of this through hole 31a. On the other hand, the rod 41 has a large diameter portion 41a formed on the upper end side, and a small diameter portion formed on the lower end side and smaller in diameter than the large diameter portion 41a. 41b and the flange part 41c formed between the large diameter part 41a and the small diameter part 41b.

The small diameter portion 41b of the rod 41 is slidably supported in the through hole 31a and the ring member 34 of the support plate 31. A spring 35 is disposed in a compressed state on the outside of the small diameter portion 41b between the flange portion 41c of the rod 41 and the upper ring member 34. Thereby, the support plate 31 is in the state elastically supported downward with respect to the rod 41 by the elastic support force of the spring 35. As shown in FIG. Moreover, the sensor 33 is supported at one end of the support plate 31 via the support rod 32 mentioned above, and is supported below the front surface of the counter column 14 below the other end of the support plate 31. The stopper 36 is arrange | positioned.

That is, when the tail stock 16 falls, the support plate 31 formed in the tail stock 16 abuts on the stopper 36, and the lower limit position of the tail stock 16 is set. Thereby, the lower end (small diameter part 41b) of the rod 41 is arrange | positioned at the falling reference position R, and the sensor 33 is arrange | positioned so as to oppose the hold | maintained workpiece | work W. As shown in FIG.

Here, the movement in the X-axis direction of the column 12, the movement in the Y and Z-axis directions in the grindstone 13, the oscillation and rotational drive in the A direction, and the Z-axis direction of the tail stock 16 are here. The lifting and lowering, the rotation drive of the rotary table 18 (workpiece W) in the C direction, the detection of the rotational phase of the sensor 33, and the like are controlled by an NC device (not shown). That is, by controlling these, it is possible to grind the workpiece W.

In addition, the support plate 31, the support rod 32, the spring 35, the stopper 36, the rod 41, etc. comprise a process error absorption means.

Next, the engagement operation and the grinding process in the gear grinding board 1 are demonstrated.

First, the workpiece W is mounted on the mounting jig 19, and the tail stock 16 is lowered. When the tail stock 16 is lowered in this manner, the support plate 31 abuts on the stopper 36 and the tail stock 16 is disposed at the lower limit position. Thereby, the tail stock center 17 is inserted in the center hole Wa of the workpiece | work W, the said workpiece | work W is hold | maintained, and the sensor 33 opposes the hold | maintained workpiece | work W. To be detected at the detection position.

Then, in the state where the sensor 33 is disposed at the detection position, the rotary table 18 is rotated to measure the position of one tooth tip (mountain) of the workpiece W, and then reversely rotated to thereby rotate the one tooth. The position of the tooth tip by the side is measured, and the rotational phase in the C direction between the tooth tips is detected based on these measurement results. Subsequently, the NC device calculates the rotational phase in the C direction in the tooth grooves (bones) between the toothed ends from the rotational phase in the C direction between the teeth of the detected workpiece W. .

Subsequently, the rotational phase in the C direction in the tooth groove of the workpiece W facing the calculated sensor 33, the specifications of the workpiece W (number of teeth, twist angle, etc.), the sensor From the detection height in the workpiece | work W of the 33, sensor angle (rotation angle of the relative C direction from the grindstone 13 side), etc., to the tooth groove of the workpiece | work W of the grindstone 13 side. The rotation phase in the C direction is calculated. And the shift amount of the rotational phase of the C direction in the tooth groove of the workpiece | work W of the calculated grindstone 13 side with respect to the grindstone 13 is calculated | required, and only the workpiece | work W only by the shifted amount of this rotational phase ), The grindstone 13 and the workpiece W are engaged with each other.

Thereafter, the rotation of the grindstone 13 and the rotation of the rotary table 18 in the C direction are synchronized, and at the same time, the column 12 is moved in the X axis direction, and the grindstone 13 is moved in the Y, Z axis directions. By turning in the A direction along with the turning, the grindstone 13 is engaged with the workpiece W, and the workpiece W is ground.

Here, the workpiece may have a small but machining error. As described above, when the workpiece is ground and rotated in the C direction around the vertical axis, the workpiece has a height dimension, that is, a tooth width dimension. If a machining error occurs, a deviation occurs in the detection position of the sensor in the Z axis direction and cannot be detected with high accuracy.

Therefore, in the engagement device which concerns on this invention, by arrange | positioning the spring 35 between the support plate 31 and the rod 41, even if a machining error arises in the height direction of the workpiece | work W, the sensor 33 Is always arranged in the same position in the Z axis direction.

In short, as shown in FIG. 2, when the height dimension of the workpiece | work W is larger than a predetermined dimension, the lower limit position of the tail stock 16 is slightly smaller than that at the time of workpiece | work predetermined dimension processing, so that the dimension becomes large. It changes upwards, and with this, the lower end of the rod 41 also descends only to the reference upper position R1 located above the lower reference position R. As shown in FIG. However, since the support plate 31 is elastically supported downward with respect to the rod 41 by the elastic support force of the spring 35, it comes into contact with the stopper 36. Thereby, even when the height dimension of the workpiece | work W is larger than a predetermined dimension, the sensor 33 is arrange | positioned at the same position in a Z-axis direction similarly to the case where the height dimension is processed to the predetermined dimension.

On the other hand, when the height dimension of the workpiece | work W is smaller than a predetermined dimension, the lower limit position of the tail stock 16 changes slightly below that at the time of workpiece | work predetermined dimension processing, so that the dimension becomes small. At this time, while the support plate 31 abuts on the stopper 36, the lower end of the rod 41 is positioned below the lower reference position R in response to the elastic bearing force of the spring 35 ( Lower to R2). In other words, the lowering of the support plate 31 is restricted by the stopper 36, but only the rod 41 descends. Thereby, even if the height dimension of the workpiece | work W is smaller than a predetermined dimension, the sensor 33 is arrange | positioned at the same position in a Z-axis direction similarly to the case where the height dimension is processed to the predetermined dimension.

Therefore, by arranging the spring 35 between the support plate 31 and the rod 41, the machining error of the height dimension of the workpiece W is absorbed, and the detection position of the sensor 33 is constant in the Z axis direction. Is maintained.

Moreover, since the sensor 33 is supported by the tail stock 16, when the engagement operation | movement is performed, it is not necessary to once retreat the grindstone 13 also at the time of detection of the sensor 33. FIG. As a result, the time required for the engagement operation is shortened. 3, since the sensor 33 is formed in the opposite side of the grindstone 13 with the workpiece | work W interposed, the distance from the grindstone 13 to the sensor 33 can be formed long. It is possible to prevent damage to the sensor 33 due to the cutting chips and the supply and scattering of the coolant of the workpiece W during grinding.

Therefore, by supporting the sensor 33 to the tail stock 16, the tail stock 16 maintains the workpiece W and detects the rotational phase of the workpiece W by the sensor 33. As a result, the engagement time can be shortened.

Further, by arranging the sensor 33 on the opposite side of the grindstone 13 with the workpiece W interposed therebetween, the sensor 33 does not participate in the engagement operation of the grindstone 13, thereby simplifying the operation thereof. This can achieve further reduction of the engagement time. In addition, since the distance from the grindstone 13 to the sensor 33 can be sufficiently maintained, it is possible to prevent damage to the sensor 33 due to the cutting chips and the supply of coolant and scattering of the workpiece W during grinding. Can be.

In addition, by forming the spring 35 between the support plate 31 and the rod 41, even if a machining error occurs in the height dimension of the workpiece W, since the machining error can be absorbed by the machining error, the sensor 33 ) Can be placed at a constant detection position. As a result, a highly accurate rotational phase can be detected.

Example 2

Fig. 4 is a side view of a main portion of a gear grinding machine equipped with an engagement device according to a second embodiment of the present invention, Fig. 5 is a schematic view showing a mounting structure of a sensor, and Fig. 6 is a view showing a positional relationship between a grindstone and a sensor with respect to a workpiece. to be. In addition, the description which attaches | subjects the same code | symbol about the member which has the same structure and function as what was demonstrated in embodiment mentioned above, abbreviate | omits.

As shown in FIGS. 4-6, the cylinder 51 is formed in the side surface of the tail stock 16 in the gear grinder 2 which is a gear processing machine, and this cylinder 51 is a Z-axis direction. A sliding rod 52 is provided. The sensor 33 is supported by the lower end of the rod 52 via the support plate 31 and the support rod 32.

The rod 52 has a large diameter portion 52a formed on the upper end side, a small diameter portion 52b formed on the lower end side, and smaller in diameter than the large diameter portion 52a, and a large diameter portion 52a and a small diameter portion 52b. It has the flange part 52c formed in between.

The small diameter portion 52b of the rod 52 is slidably supported in the through hole 31a and the ring member 34 of the support plate 31. A spring 35 is disposed in a compressed state on the outside of the small diameter portion 52b between the flange 52c of the rod 52 and the upper ring member 34. Thereby, the support plate 31 is in the state elastically supported below the rod 52 by the elastic support force of the spring 35. As shown in FIG.

That is, when the tail stock 16 falls, the support plate 31 formed in the tail stock 16 abuts on the stopper 36, and the lower limit position of the tail stock 16 is set. Thereby, the lower end (small diameter part 52b) of the rod 52 is arrange | positioned at the falling reference position R, and the sensor 33 is arrange | positioned so that it may oppose the hold | maintained workpiece | work W. As shown in FIG. Moreover, when the tail stock 16 is arrange | positioned at the lower limit position, the sensor 33 moves between the detection position S1 and the retracted position S2 by driving the cylinder 51 to expand and contract the rod 52. .

Here, the movement in the X-axis direction of the column 12, the movement in the Y and Z-axis directions in the grindstone 13, the oscillation and rotational drive in the A direction, and the Z-axis direction of the tail stock 16 are here. Lifting and lowering, the rotational drive of the rotary table 18 (workpiece W) in the C direction, the detection of the rotational phase of the sensor 33, the drive of the cylinder 51 and the like are controlled by an NC device (not shown). have. That is, by controlling these, it is possible to grind the workpiece W.

In addition, the support plate 31, the support rod 32, the spring 35, the stopper 36, the cylinder 51, the rod 52, etc. comprise a process error absorption means.

Next, the engagement operation and the grinding process in the gear grinding board 2 are demonstrated.

First, the workpiece W is mounted on the mounting jig 19, and the tail stock 16 is lowered while the rod 52 of the cylinder 51 is extended. When the tail stock 16 is lowered in this manner, the support plate 31 abuts on the stopper 36 and the tail stock 16 is disposed at the lower limit position. Thereby, the tail stock center 17 is inserted in the center hole Wa of the workpiece | work W, the said workpiece | work W is hold | maintained, and the sensor 33 opposes the hold | maintained workpiece | work W. It is arrange | positioned at the detection position S1.

And in the state where the sensor 33 is arrange | positioned in the detection position S1, after rotating the rotary table 18 and measuring the position of one tooth tip (mount | hang) of the workpiece | work W, it rotates backward and the The position of the tooth tip by one tooth tip is measured, and the rotational phase in the C direction between the tooth tips is detected based on these measurement results. Subsequently, the NC device calculates the rotational phase in the C direction in the tooth grooves (bones) between the toothed ends from the rotational phase in the C direction between the teeth of the detected workpiece W. .

Subsequently, the rotational phase in the C direction in the tooth groove of the workpiece W facing the calculated sensor 33, the specifications of the workpiece W (number of teeth, twist angle, etc.), the sensor 33 C direction in the tooth groove of the workpiece | work W on the grindstone 13 side from detection height in the workpiece | work W, sensor angle (rotation angle of the relative C direction from the grindstone 13 side), etc. Calculate the rotational phase of. And the shift amount of the rotational phase of the C direction in the tooth groove of the workpiece | work W of the calculated grindstone 13 side with respect to the grindstone 13 is calculated | required, and only the workpiece | work W only by the shift amount of this rotational phase ), The grindstone 13 and the workpiece W are engaged with each other.

Thereafter, the cylinder 51 is driven to shorten the rod 52, and the sensor 33 is raised from the detection position S1 to the retracted position S2. Subsequently, the rotation of the grindstone 13 and the rotation of the turntable 18 in the C direction are synchronized, and at the same time, the column 12 is moved in the X axis direction, and the grindstone 13 is moved in the Y, Z axis directions. In addition, by turning in the A direction, the grindstone 13 meshes with the workpiece | work W, and the said workpiece | work W is subjected to the grinding process.

Here, the workpiece may have a small but machining error. As described above, when the workpiece is ground and rotated in the C direction around the vertical axis, the workpiece has a height dimension, that is, a tooth width dimension. If a machining error occurs, a deviation occurs in the detection position S1 of the sensor in the Z axis direction and cannot be detected with high accuracy.

Therefore, in the engagement device which concerns on this invention, by arrange | positioning the spring 35 between the support plate 31 and the rod 52, even if a machining error arises in the height direction of the workpiece | work W, the sensor 33 Is always arranged in the same position in the Z axis direction.

That is, as shown in FIG. 5, when the height dimension of the workpiece | work W is larger than a predetermined dimension, the lower limit position of the tail stock 16 is slightly smaller than that at the time of workpiece | work predetermined dimension processing, so that the dimension becomes large. It changes upwards, and with this, the lower end of the rod 52 also descends only to the reference upper position R1 located above the lower reference position R. As shown in FIG. However, since the support plate 31 is elastically supported downward with respect to the rod 41 by the elastic support force of the spring 35, it comes into contact with the stopper 36. Thereby, even when the height dimension of the workpiece | work W is larger than a predetermined dimension, the sensor 33 is arrange | positioned at the same position in a Z-axis direction similarly to the case where the height dimension is processed to the predetermined dimension.

On the other hand, when the height dimension of the workpiece | work W is smaller than a predetermined dimension, the lower limit position of the tail stock 16 changes slightly below that at the time of workpiece | work predetermined dimension processing, so that the dimension becomes small. At this time, while the support plate 31 abuts on the stopper 36, the lower end of the rod 41 is positioned below the lower reference position R in response to the elastic bearing force of the spring 35 ( Lower to R2). That is, although the lowering of the support plate 31 is restricted by the stopper 36, only the rod 52 descends. Thereby, even if the height dimension of the workpiece | work W is smaller than a predetermined dimension, the sensor 33 is arrange | positioned at the same position in a Z-axis direction similarly to the case where the height dimension is processed to the predetermined dimension.

Therefore, by arrange | positioning the spring 35 between the support plate 31 and the rod 52, the machining error of the height dimension of the workpiece | work W is absorbed, and the detection position S1 of the sensor 33 is a Z-axis direction Is kept constant.

Moreover, since the sensor 33 is supported by the tail stock 16, when the engagement operation | movement is performed, it is not necessary to once retreat the grindstone 13 also at the time of detection of the sensor 33. FIG. As a result, the time required for the engagement operation is shortened. In addition, since the sensor 33 on which the detection of the rotational phase has been completed is raised to the retracted position S2, the distance from the grindstone 13 to the sensor 33 can be formed long, and the work piece at the time of grinding ( Damage to the sensor 33 due to the cutting chips and the supply and scattering of the coolant of W) is prevented.

In addition, in the above-described operation, the tail stock 16 is lowered while the rod 52 of the cylinder 51 is extended so that the sensor 33 is arranged at the detection position S1. The tail stock 16 may be lowered while the rod 52 of the 51 is shortened, and the sensor 33 may be disposed at the retracted position S2 once, and then lowered to the detected position S1. In addition to the cylinder 51 and the rod 52, a retraction mechanism for retracting the sensor 33 outward in the radial direction of the workpiece W may be further provided, or only this retraction mechanism may be formed. .

Therefore, by supporting the sensor 33 to the tail stock 16, the tail stock 16 maintains the workpiece W and detects the rotational phase of the workpiece W by the sensor 33. As a result, the engagement time can be shortened.

Moreover, when the sensor 51 forms the cylinder 51 which raises and lowers between the detection position S1 and the retracted position S2, and the sensor 33 does not detect a rotational phase, ie, meshing or grinding, By placing the sensor 33 at the retracted position S2 at the time, since the sensor 33 does not participate in the engagement operation of the grindstone 13, the operation can be simplified and further shorten the engagement time. We can plan. In addition, since the distance from the grindstone 13 to the sensor 33 can be sufficiently maintained, it is possible to prevent damage to the sensor 33 due to the cutting chips and the supply of coolant and scattering of the workpiece W during grinding. Can be.

Moreover, by forming the spring 35 between the support plate 31 and the rod 52 of the cylinder 51, even if a machining error occurs in the height dimension of the workpiece | work W, it can absorb only the machining error. Therefore, the sensor 33 can be arrange | positioned at a fixed detection position. As a result, a highly accurate rotational phase can be detected.

Moreover, in the above-mentioned embodiment, although the spring 35 was formed between the support plate 31 and the rod 41 or the rod 52, it is not necessary to necessarily form this spring 35, and the rod 41 Alternatively, the lower end of the rod 52 may be fixed to the support plate 31. Moreover, although the engaging device which concerns on this invention was applied to the gear grinding mill which grinds a gear-like workpiece using a threaded grindstone, for example, gears, such as a hob board which processes a gear-shaped workpiece using a threaded hob cutter, You may apply to a processing machine.

When tooth error and root error occur in the gear to be processed, it can be applied to a gear processing machine such as a gear grinding machine to correct both errors accurately and appropriately.

Claims (5)

An engagement device for engaging a rotary tool and a work gear, and engaging them so that there is a rotational phase relationship in which the rotary tool and the work gear can be engaged, prior to gear rotation by relatively rotating them. A workpiece holding means which is movably supported in the axial direction of the workpiece gear and presses the workpiece gear toward the workpiece rotating means for rotating the shaft around the axis, thereby holding the workpiece gear rotatably; It is provided in the said workpiece holding means, When the workpiece holding means hold | maintains the to-be-processed gear, it is provided with the rotation phase detection means which detects the rotational phase of the to-be-processed gear facing the to-be-processed gear. Interlocking device made. The method of claim 1, And said rotating phase detecting means is disposed on an opposite side of said rotating tool with said working gear therebetween. The method of claim 1, And an evacuation means for evacuating said rotational phase detecting means from a detection position for detecting the rotational phase of said to-be-processed gear. The method according to any one of claims 1 to 3, And a work error absorbing means for absorbing a work error in the axial direction of the work gear when the work holding means holds the work gear. The gear processing machine provided with the engagement device as described in any one of Claims 1-4.

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